Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1990 Land Rover Range Rover BaseFACTORY OEM SERVICE PROCEDURE
Preliminary Checks
CAUTION:
If engine is misfiring or fails to start within 12 seconds the cause must be rectified. Failure to do so will result in irreparable damage to the catalysts. After rectification, the engine must be run at 1500 RPM (no load) for 3 minutes to purge any accumulation of fuel in the system.
- Check that the inertia fuel shutoff switch is not tripped. Inertial fuel shutoff switch is located beneath left front seat. See Fig 1 .
- Check main and fuel pump relay fuses.
- Check for ample fuel in tank.
- Check air inlet system for possible leaks into the intake manifold.
- Check spark plug wires for correct firing order, routing and visual damage. See appropriate SPECIFICATIONS article.
- Check ignition timing. See appropriate SPECIFICATIONS article.
Only when the above checks have been carried out, should circuit diagnosis begin.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.